Stove



B. B. KAHN Sept. 17, 1935.

STOVE Filed Oct. 31, 1932 2 Sheets-Sheet 1 B. B. KAHN Sept. 17, 1935.

STOVE Filed Oct. 31, 1932 2 Sheets-Sheet 2 TIP "33 49 M M M Patented Sept; 11, 1935 UNITED STATES STOVE Bertrand B. .Kahn, Cincinnati, Ohio, assignor to The Estate Stove Company, Hamilton, Ohio, a

corporation of Ohio Application October 31, 1932, Serial No. 640,389 17 Claims. (01. 126116) This invention relates to stoves. One of the objects of the invention is the'provision of an effective" burner igniting device of simple construction comprising a pilot burner and a pilot jet opening that is relatively movable thereto for directinga' pilot flame toward the burner, and for ignition at a position remote with respect to the burner.

Another object of the invention is the provision of a pilot burner comprising telescopically related fuel conducting members having a jet opening which is readily movable to an accessi 'the accompanying drawings and the appended claims.

In the drawings, which disclose a preferred embodiment of the invention- Fig. 1 is a plan view of heater that is constructed in v accordance with this invention, and in which some of the parts have been broken away for clearne'ss of illustration;

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1; o

Fig. 3 is a sectional view taken on the line 33 of Fig. 2; v

Fig. 4 is an enlarged fragmentary sectional view of the upper portion of the igniting device;

Fig. 5 is an enlarged fragmentary sectional view of the lower portion of. the igniting device in the position of use; and j' Fig. 6 is a fragmentary sectional view showing the igniting device in the position forpilot ignition.

The drawings, in which like characters of ref-- erence designatelike parts throughout the several views thereof, illustrate a stove or heater of the type which is used for room heating and is shown as having a burner l that is positioned at the bottom of an enclosed combustion chamber l I over which currents of air pass for the absorption of heat therefrom. As shown, the heater is constructed for suspension from a room floor l2 between the floor joists which are indicated at I 2'. The heater is suspended from a plate like floor member l3 which overlies the edge of the floor opening it. The floor member or plate l3 has a downturned flange I! to which is attached an outer shell l that serves as an air flow directing enclosure or housing for the I heater combustion chamber H, and is suitably insulated against heat loss to the surrounding air. The plate l3 has a central opening defined 5 by the seat l8 and the downturned flange I9. The seat l8 formed in the rim of the plate opening serves to" support a removable grille 20 through which the warmed air from the heater passes into the room.

The heater burner l0 stands within an opening 2| of the bottom wall 22 of the out'er shell l5 and, as shown; is supported on a plate 22' so that the burner flame is directed into the combustion chamber II- that stands directly above it. The spaced side walls 23 of the central chamber 2-2 serve as a hood or enclosure for the burner. Secondary radiators 25 stand parallel with and on each side of thecentral chamber 24. i The path of the heated products of combustion from the burner I0 is upwardly through the central chamber 24, then through communicating passages 21 into the side radiators 25, then downwardly through these side radiators and out the passages 28 which communicate with a flue box 30 to which the flue pipe 3| is connected. The central compartment 24 as well as the radiators 25 are preferably formed of sheet metal with corrugated side walls as indicated at 32 in Fig. 1.

As shown, the under side of the heater burner is enclosed by a curved plate 33. Secondary air for the burner enters through the openings between the plate 33 and the suspended end closures 34.

I The air that is tobe warmed enters the heater 3.;

through grille openings 35 formed in the plate I3 between the plate flanges l1 and I8. A sheet metal member or bafile 36 is suspended from the flange l8 and serves to direct the air currents downwardly through the duct or passage 31 4:) formed by the spaced walls i5 and 36, and into communication with the heating chambers adjacent the lower part of the heater. As the air currents are warmed by contact with the heated surface of the combustion chambers they pass upwardly and out through the grille 20.

In this form of heater, as well as a heater arranged for installation within a room it is essential to have the burncr well housed to prevent the escape of fumes into the room. Heretofore 5O burner ignition has been obtained by applying a flame through housing openings that must be closed after igniting the burner. The inconvenience of this method of igniting has been lessened to some degree by providing a constantly burning pilot light, but even this must be ignited occasionally during a heating season. With such an arrangement in a heater adapted for room installation the operator is required to stoop to the level of the burner to apply an igniting flame through an opening in the heater housing. To properly direct the igniting flame the eye must be brought in line with. the opening with the resulting danger of burns from apuiT or explosion that may result from an accumulation of gas. In a suspended heater ignition is rendered even more difficult as such installations are usually made in houses having no basement so that the operator must either use a long taper to reach the burner through an opening in the top of the housing or must go to within reach of the burner. In either case the operator may fail to close the housing opening after ignition with the resulting escape of burner fumes into the room. Even if a pilot light is used this may be inadvertently extinguished a number of times during the heating season so that a convenient means of ignition is highly desirable.

In order to obtain ready ignition of the burner, and for convenient maintenance of a pilot light, an igniting device is provided which comprises a movable pilot jet of such construction that it may be withdrawn from its normal position of use adjacent the burner to a position wherein it is accessible for ignition. In the illustrated construction of heater this is accomplished by withdrawing the pilot jet through an opening in the top of the heater adjacent the opening in the floor plate. This is done after removing the grille 20.

The ignition device, which is indicated generally 7 by the numeral 40, comprises telescopically related fuel conducting tubes or pipes which are movable relatively to one another. One end of one tube is connected to a source of fuel supply while the other tube has one or more fuel jets formed on it. The igniting device may be arranged so that the jets in the movable tube will serve to ignite the heater burner directly when moved to the position of use, or a stationary normally burning pilot may be included which stands adjacent the heater burner and in such relationship to the movable jetas to be ignited by it to then in turn ignite the heater burner. As shown, the burner igniting device comprises a fixed tube 4| which stands substantially vertically, and is supported from a stationary pilot burner box 42 which stands adjacent the heater burner Ill. The stationary pilot burner box 42 has spaced jets 42 which are positioned to direct igniting flames toward the jet openings ID of the heater burner In. The tube 4| extends from within the compartment or housing 24 through an opening '43 in the top of the wall 23 and terminates a short distance above the housing opening in an outwardly flared open end 45. Fuel may be supplied independently to the tube 4| and to the pilot box 42, or, as shown, these parts may be interconnected to a common source of fuel through a regulating valve 45 having a pipe connection 41 to a shut-oil valve 48 that communicates through a pipe 48 to the fuel supply line 58. The shut-off valve 48 is provided with a long operating stem 52 that terminates in a removable control handle 53 above the level of the plate l3.

The pilot igniting flame issues from jets adjacent the lower open end of a pipe 56 which telescopes the pipe 4|. As shown, a plurality of circumferentially spaced jet openings 55 are provided. The pipe 56 is of somewhat larger diameter than the pipe 4| so that there is sumcient space between the exterior wall of the pipe 4| and the interior wall of the enclosing pipe 56 to serve as a fuel passage for supplying the pilot jets 55. The pilot jets 55 normally stand in burner igniting position and are shown in Figs. 3 and adjacent the pilot burner box 42. supported in the normal position of use by engagement of a fitting 51 on the pipe 56 with a ring 58 formed on the exterior of the heating chamber wall 23 at the opening 43. As shown, this fitting 51 threadedly engages the upper end of the pipe 55 and has a lower portion 60 of spherical shape which is proportioned to be closely received within a socket 6| of corresponding shape in the member 56. The fitting 51, which serves as a handle for withdrawing the movable member 55 of the igniting device, not only positions the pilot jet in proper operating relationship but acts also as a closure for the burner housing to prevent the escape of the products of combustion into the warm air currents.

When it is desired to ignite the pilot burner the grille 20 is removed whereupon, by lifting the pipe 56, the movable jets 55 are moved to a convenient position on the exterior of the compartment 24. The length of the pipes is such that the pipe 56 may be withdrawn an amount suflicient to bring the pilot jet 55 beyond the confines of the heating compartment 24 and within ready access from the level of the floor 2. Upward movement of the pipe 56 is limited by inter-engagement oi the pipe ends. The lower open end of pipe 56 is a close sliding fit on the pipe 4| as is indicated at 63. Upon withdrawing the pipe 56 the outwardly flared end 45 of the pipe 4| serves as a stop by engagement with the restricted lower end 63 of the outside pipe. The pilot pipe may be supported in withdrawn position by' engagement of 9. lug 56' on the pipe 56 witha finger 64 which extends from the plate I3 as shown in Fig. 6. Upon opening the valve 48 by manipulation of the handle 53 the movable jets 55 may be ignited whereupon the pipe 55 is lowered to the position of use. As the jets 55 are lowered they are brought into communication with the fuel issuing from the jets 42' for ignition of the stationary pilot and consequent ignition of the burner Hi. When a stationary pilot burner is included in the igniting device it is not necessary for the jets 55 to burn continuously. To extinguish the jets 55 after igniting the jets 42, the fitting 51 is provided with a plug handle 61 that is shown positioned beside the handle 53 of the pilot burner.

Operation of the burner I 0 and of the pilot can be readily observed through a window which is formedin the top of the central heating compartment 24. The window 10 may be formed or glass or mica or some other suitable noncombustible transparent material and, by being in direct line between the openings of the grille 20 and the burners, serves to give the operator a clear view of the burners.

The provision of an igniting device incorporating a movable jet which may be readily withdrawn from its normal position adjacent the burner to an accessible igniting position elimi- The jets 55 are nates the inconvenience of limiting a remotely 2,014,849 positioned burner. The igniting device is equally source of serviceable for use in any heater wherein the burner is riot readily accessible and may be mounted so that its withdrawal is in any desired direction for convenient burner ignition.

departing from the scope o'ftheinvention which isdefined in the appended claims.

What is claimed is:

1. ,A device'ofihe characterldescribedco-mpris ing a gas burner having a fuel supply connection,

a stationary pilot positioned adjacent; the]. gas burner and having an independently controlled fuel supply connection, and igniting means for. the stationary pilot, comprising" a movable mem-. her having a jet opcning,.and means for guiding said. movable member from aposition in which the jetcpening'stands.adjacent the "stationary pilot burner as an igniter therefor to a position remote from the stationary pilot burner f or igni- I tion of the movable jet. a

2. A device ofv ,thecharacter described com prising a gas burner having affuelsupply con nection, a' stationary pilot positioned adjacent the.

gas burner and having an independently controlled fuel supply connection, and igniting means for the stationary pilot comprisinga movable memberhaving .a jet opening, and fuel supply means for said movable memberin communication with and supported from said stationary pilot burner, said fuel supply means. comprising a guide for directing the movement of the movable jet member from a position in which the jet opening stands adjacentv the stationary pilot as an igniter therefor to a position remote from.

the stationary pilot for ignition ofthe movable pilot. v H

3; A device of v the character described comprising a gas burnerhaving a fuel supply connection, a stationary pilotpositioned adjacentthe gas burner and having an independently controlled fuelsupplyconnection, and. igniting means for the stationary pilotcomprising a. fixed fuel, conducting member adapted to be attaehedto-a sourceof gassupply, apmovable fuel conducting member telescopically related to said first named member and in communication therewith for the passage of fuel therethroughysaid movable member having a jet opening and being extensible on the fixed member'for movement of the jet opening from a position adjacent said stationary pilot burner to a position remote with respect to said burner for ignition of said jet.

4. A device of the character described, comprising a gas burner, and igniting means therefor comprising a fixed fuel conducting member arranged independently of the gas burner and adapted to be attached to a source of gas supply,

a movable fuel conducting member telescopically gas supply, an outer pipe telescopically related to said inner pipe and slidable thereon, a closure on said outer pipe adjacent the open end of the inner pipe, and a pilot jet on said outer pipe adjacent the open" end thereof, said pilot jet being adapted to direct a pilot flame toward the remotely positioned burner when the pipes are telescoped and to be accessible for ignition at" a position remote from'the burner when the pipes are extended with respect to one another.

6. Ajdevice of the character described, compris ing a'gas burner, and igniting means therefor,

comprising a fixed fuel conducting member adapted to b'eattached to a source of gas supply, a movable 'fuel c'onducting member telescopically relat'ed to said first named member and in communication therewith for the passage of fuel thereth rough, and ,a pilot jet. on said movable member. said movable member being extensible. on the fixed member for movement of the jet from a position adjacent said burner to aposition, remote with respect to said burnerand accessible for ignition. means to limit the. telescoping movement of said members to position thepilot jet adjacent the remotely positioned burner, and means to limit the withdrawal of the movable member on the fixed member.

7. An igniting device fora remotely positioned burner comprising a'fixed .fuel conducting memberladapted to be attached to a source of gas sup ply, a movable fuel conducting member par-' tially telescoping said first namedmember and in communication therewith for the passage of fuel therethrough, a closure on the end of said movable member, a restriction at the open end of said movable member providing a close sliding fit with the fixed member, a shoulder on the tele scoped end of the fixed member for limiting the withdrawal of the movable memberby engagement with the close fitting open end thereof, and a pilot jet adjacent the open end of the movable member for directing a pilot fiametowarcl the remotely positioned burner when the fuel con-.

ducting members are telescoped and accessiblefor ignitionat a position remote from said burner when the fuel conducting members are extended.

8. Ina gas fired heater comprising a burner and-a housing, an igniting device comprising a stationary pilot positioned adjacent said burner.

a movable pilot jet, supporting. means for said jet. and means for guiding said supporting means and jet from a position on the exterior of the housing for jet ignition to.a position within the housing wherein the jetstands adjacent the stationary pilot for burner ignition.

9. A gas fired heater comprising a burner and a housing therefor, said housing having an opening therein, an igniting device for said burner comprising a stationary pilot burner box positioned adjacent said burner, a movable pilot, and fuel supply means for said movable pilot comprising a member in communication with said pilot burner box and extending therefrom for uiding the movement of the movable pilot from an igniting position on the exterior of the housing to a position within the housing and adjacent the stationary pilot burner box for burner ignition.

10. In a gas fired heater comprising a housing and a burner positioned therein, a burner igniting device comprising a fixed fuel conducting member adapted for connection to a source of gas supply, a movable fuel conducting member telescopically related to and in fuel fiow communication with said fixed member, a pilot jet in and a burner positioned therein, a burner igniting device comprising a fixed fuel conducting member adapted for connection to a source of gas supply, a movable fuel conducting member telescopically related to and in fuel flow communication with said fixed member, a pilot jet in said movable member for ignition of said heater burner, said heater housing having an opening therein for reception of the movable member whereby the burner jet may be moved from an igniting position on the exterior of the housing when the fuel conducting members are extended to a position within the housing adjacent the heater burner as a pilot therefor when the fuel conducting members are telescoped with respect to one another, and means positioned on the movable member to engage the housing as a closure for the housing opening and to limit the telescoping movement of said members.

12. A heater for suspension at a floor opening comprising a member adapted for support at the floor opening, a combustion chamber, combustion chamber enclosing means suspended from said floor member and forming an air flow duct, said floor member having openings therein in registration with the enclosure duct ends, a main gas burner positioned within said combustion chamber remote from the floor'opening, a burner igniting device comprising a pilot burner movable from a position adjacent said main gas burner to an igniting position on the exterior of the combustion chamber and adjacent one of said floor member openings, means sl-idably supporting the burner for guided movement in a fixed path, and means on the supporting means to limit the movement oi the pilot burner in one direction to a position corresponding to the igniting position.-

13. A heater for suspension at a floor opening comprising a member adapted for support at the floor opening, said floor member having an opening therein, a combustion chamber, combustion chamber enclosing means attached to said floor member and enclosing said floor member opening, a main gas burner positioned within said combustion chamber remote from the floor opening, and an igniting device for said burner comprising a normally burning stationary pilot positioned adjacent said main gas burner and a jet for ignition of the stationary pilot, said jet being movable from a position adjacent said stationary pilot to an igniting position on the exterior of the combustion chamber adjacent said floor member opening.

14. An igniting device for a gas burner comprising a movable member having a pilot jet opening therein, fuel supply means for said movable member comprising a guide for directing the movement of the movable member from a pilot igniting position remote from the burner to adjacent the burner for burner ignition, and means on the movable member to control the supply of fuel to the pilot jet opening.

15. An igniting device for a remotely positioned gas burner comprising a fixed fuel conducting member adapted to be attached to a source of gas supply, a movable fuel conducting member telescopically related' to said first named member and in communication therewith for the passage of fuel therethrough, said movable member having a pilot jet opening and being extensible on the fixed member for movement of the jet opening from a posit-ion adjacent said burner to a position remote with respect to said burner for ignition of said jet, and means on the movable member to control the supply of fuel to the pilot jet opening.

16. An igniting device for a gas burner comprising a stationary pilot burner, a movable member having a pilot jet opening, means for guiding said movable member from a position in which the jet opening stands adjacent the stationary pilot burner as an igniter therefor to a position remote from the stationary pilot burner for ignition of the movable jet, and means automatically operable to close the fuel supply to the movable jet opening when positioned adjacent the stationary burner.

17. An igniting device for a gas burner comprising a stationary pilot burner, a movable member having a pilot jet opening, means for guiding said movable member from a position in which the jet opening stands adjacent the stationary pilot burner as an igniter therefor to a position remote from the stationary pilot burner for ignition of the movable jet, and means for limiting the movement of the-movable member and jet opening toward the stationary pilot, said limiting means comprising a closure for the fuel supply to said jet.

.BER'I'RAND B. KAHN. 

